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devmapper: show device and loop file , if used

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Presenly the "Data file:" shows either the loopback _file_ or the block device.
With this, the "Data file:" will always show the device, and if it is a
loopback, then there will additionally be a "Data loop file:".
(Same for "Metadata file:")

Signed-off-by: Vincent Batts <vbatts@redhat.com>
This commit is contained in:
Vincent Batts 2015-01-09 11:20:07 -05:00
parent ef2d6dda0f
commit 09c033ff87
2 changed files with 37 additions and 16 deletions
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43
daemon/graphdriver/devmapper/deviceset.go
View file

@ -89,8 +89,10 @@ type DeviceSet struct {
filesystem string
mountOptions string
mkfsArgs []string
dataDevice string
metadataDevice string
dataDevice string // block or loop dev
dataLoopFile string // loopback file, if used
metadataDevice string // block or loop dev
metadataLoopFile string // loopback file, if used
doBlkDiscard bool
thinpBlockSize uint32
thinPoolDevice string
@ -104,8 +106,10 @@ type DiskUsage struct {
type Status struct {
PoolName string
DataLoopback string
MetadataLoopback string
DataFile string // actual block device for data
DataLoopback string // loopback file, if used
MetadataFile string // actual block device for metadata
MetadataLoopback string // loopback file, if used
Data DiskUsage
Metadata DiskUsage
SectorSize uint64
@ -1013,6 +1017,8 @@ func (devices *DeviceSet) initDevmapper(doInit bool) error {
if err != nil {
return err
}
devices.dataLoopFile = data
devices.dataDevice = dataFile.Name()
} else {
dataFile, err = os.OpenFile(devices.dataDevice, os.O_RDWR, 0600)
if err != nil {
@ -1044,6 +1050,8 @@ func (devices *DeviceSet) initDevmapper(doInit bool) error {
if err != nil {
return err
}
devices.metadataLoopFile = metadata
devices.metadataDevice = metadataFile.Name()
} else {
metadataFile, err = os.OpenFile(devices.metadataDevice, os.O_RDWR, 0600)
if err != nil {
@ -1540,6 +1548,19 @@ func (devices *DeviceSet) poolStatus() (totalSizeInSectors, transactionId, dataU
return
}
// MetadataDevicePath returns the path to the metadata storage for this deviceset,
// regardless of loopback or block device
func (devices DeviceSet) DataDevicePath() string {
return devices.dataDevice
}
// MetadataDevicePath returns the path to the metadata storage for this deviceset,
// regardless of loopback or block device
func (devices DeviceSet) MetadataDevicePath() string {
return devices.metadataDevice
}
// Status returns the current status of this deviceset
func (devices *DeviceSet) Status() *Status {
devices.Lock()
defer devices.Unlock()
@ -1547,16 +1568,10 @@ func (devices *DeviceSet) Status() *Status {
status := &Status{}
status.PoolName = devices.getPoolName()
if len(devices.dataDevice) > 0 {
status.DataLoopback = devices.dataDevice
} else {
status.DataLoopback = path.Join(devices.loopbackDir(), "data")
}
if len(devices.metadataDevice) > 0 {
status.MetadataLoopback = devices.metadataDevice
} else {
status.MetadataLoopback = path.Join(devices.loopbackDir(), "metadata")
}
status.DataFile = devices.DataDevicePath()
status.DataLoopback = devices.dataLoopFile
status.MetadataFile = devices.MetadataDevicePath()
status.MetadataLoopback = devices.metadataLoopFile
totalSizeInSectors, _, dataUsed, dataTotal, metadataUsed, metadataTotal, err := devices.poolStatus()
if err == nil {

10
daemon/graphdriver/devmapper/driver.go
View file

@ -57,13 +57,19 @@ func (d *Driver) Status() [][2]string {
status := [][2]string{
{"Pool Name", s.PoolName},
{"Pool Blocksize", fmt.Sprintf("%s", units.HumanSize(float64(s.SectorSize)))},
{"Data file", s.DataLoopback},
{"Metadata file", s.MetadataLoopback},
{"Data file", s.DataFile},
{"Metadata file", s.MetadataFile},
{"Data Space Used", fmt.Sprintf("%s", units.HumanSize(float64(s.Data.Used)))},
{"Data Space Total", fmt.Sprintf("%s", units.HumanSize(float64(s.Data.Total)))},
{"Metadata Space Used", fmt.Sprintf("%s", units.HumanSize(float64(s.Metadata.Used)))},
{"Metadata Space Total", fmt.Sprintf("%s", units.HumanSize(float64(s.Metadata.Total)))},
}
if len(s.DataLoopback) > 0 {
status = append(status, [2]string{"Data loop file", s.DataLoopback})
}
if len(s.MetadataLoopback) > 0 {
status = append(status, [2]string{"Metadata loop file", s.MetadataLoopback})
}
if vStr, err := devicemapper.GetLibraryVersion(); err == nil {
status = append(status, [2]string{"Library Version", vStr})
}